Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/drivers/input/misc/mc13783-pwrbutton.c

  1 /**
  2  * Copyright (C) 2011 Philippe R├ętornaz
  3  *
  4  * Based on twl4030-pwrbutton driver by:
  5  *     Peter De Schrijver <peter.de-schrijver@nokia.com>
  6  *     Felipe Balbi <felipe.balbi@nokia.com>
  7  *
  8  * This file is subject to the terms and conditions of the GNU General
  9  * Public License. See the file "COPYING" in the main directory of this
 10  * archive for more details.
 11  *
 12  * This program is distributed in the hope that it will be useful,
 13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 15  * GNU General Public License for more details.
 16  *
 17  * You should have received a copy of the GNU General Public License
 18  * along with this program; if not, write to the Free Software
 19  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335  USA
 20  */
 21 
 22 #include <linux/module.h>
 23 #include <linux/kernel.h>
 24 #include <linux/errno.h>
 25 #include <linux/input.h>
 26 #include <linux/interrupt.h>
 27 #include <linux/platform_device.h>
 28 #include <linux/mfd/mc13783.h>
 29 #include <linux/sched.h>
 30 #include <linux/slab.h>
 31 
 32 struct mc13783_pwrb {
 33         struct input_dev *pwr;
 34         struct mc13xxx *mc13783;
 35 #define MC13783_PWRB_B1_POL_INVERT      (1 << 0)
 36 #define MC13783_PWRB_B2_POL_INVERT      (1 << 1)
 37 #define MC13783_PWRB_B3_POL_INVERT      (1 << 2)
 38         int flags;
 39         unsigned short keymap[3];
 40 };
 41 
 42 #define MC13783_REG_INTERRUPT_SENSE_1           5
 43 #define MC13783_IRQSENSE1_ONOFD1S               (1 << 3)
 44 #define MC13783_IRQSENSE1_ONOFD2S               (1 << 4)
 45 #define MC13783_IRQSENSE1_ONOFD3S               (1 << 5)
 46 
 47 #define MC13783_REG_POWER_CONTROL_2             15
 48 #define MC13783_POWER_CONTROL_2_ON1BDBNC        4
 49 #define MC13783_POWER_CONTROL_2_ON2BDBNC        6
 50 #define MC13783_POWER_CONTROL_2_ON3BDBNC        8
 51 #define MC13783_POWER_CONTROL_2_ON1BRSTEN       (1 << 1)
 52 #define MC13783_POWER_CONTROL_2_ON2BRSTEN       (1 << 2)
 53 #define MC13783_POWER_CONTROL_2_ON3BRSTEN       (1 << 3)
 54 
 55 static irqreturn_t button_irq(int irq, void *_priv)
 56 {
 57         struct mc13783_pwrb *priv = _priv;
 58         int val;
 59 
 60         mc13xxx_irq_ack(priv->mc13783, irq);
 61         mc13xxx_reg_read(priv->mc13783, MC13783_REG_INTERRUPT_SENSE_1, &val);
 62 
 63         switch (irq) {
 64         case MC13783_IRQ_ONOFD1:
 65                 val = val & MC13783_IRQSENSE1_ONOFD1S ? 1 : 0;
 66                 if (priv->flags & MC13783_PWRB_B1_POL_INVERT)
 67                         val ^= 1;
 68                 input_report_key(priv->pwr, priv->keymap[0], val);
 69                 break;
 70 
 71         case MC13783_IRQ_ONOFD2:
 72                 val = val & MC13783_IRQSENSE1_ONOFD2S ? 1 : 0;
 73                 if (priv->flags & MC13783_PWRB_B2_POL_INVERT)
 74                         val ^= 1;
 75                 input_report_key(priv->pwr, priv->keymap[1], val);
 76                 break;
 77 
 78         case MC13783_IRQ_ONOFD3:
 79                 val = val & MC13783_IRQSENSE1_ONOFD3S ? 1 : 0;
 80                 if (priv->flags & MC13783_PWRB_B3_POL_INVERT)
 81                         val ^= 1;
 82                 input_report_key(priv->pwr, priv->keymap[2], val);
 83                 break;
 84         }
 85 
 86         input_sync(priv->pwr);
 87 
 88         return IRQ_HANDLED;
 89 }
 90 
 91 static int mc13783_pwrbutton_probe(struct platform_device *pdev)
 92 {
 93         const struct mc13xxx_buttons_platform_data *pdata;
 94         struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent);
 95         struct input_dev *pwr;
 96         struct mc13783_pwrb *priv;
 97         int err = 0;
 98         int reg = 0;
 99 
100         pdata = dev_get_platdata(&pdev->dev);
101         if (!pdata) {
102                 dev_err(&pdev->dev, "missing platform data\n");
103                 return -ENODEV;
104         }
105 
106         pwr = input_allocate_device();
107         if (!pwr) {
108                 dev_dbg(&pdev->dev, "Can't allocate power button\n");
109                 return -ENOMEM;
110         }
111 
112         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
113         if (!priv) {
114                 err = -ENOMEM;
115                 dev_dbg(&pdev->dev, "Can't allocate power button\n");
116                 goto free_input_dev;
117         }
118 
119         reg |= (pdata->b1on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON1BDBNC;
120         reg |= (pdata->b2on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON2BDBNC;
121         reg |= (pdata->b3on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON3BDBNC;
122 
123         priv->pwr = pwr;
124         priv->mc13783 = mc13783;
125 
126         mc13xxx_lock(mc13783);
127 
128         if (pdata->b1on_flags & MC13783_BUTTON_ENABLE) {
129                 priv->keymap[0] = pdata->b1on_key;
130                 if (pdata->b1on_key != KEY_RESERVED)
131                         __set_bit(pdata->b1on_key, pwr->keybit);
132 
133                 if (pdata->b1on_flags & MC13783_BUTTON_POL_INVERT)
134                         priv->flags |= MC13783_PWRB_B1_POL_INVERT;
135 
136                 if (pdata->b1on_flags & MC13783_BUTTON_RESET_EN)
137                         reg |= MC13783_POWER_CONTROL_2_ON1BRSTEN;
138 
139                 err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD1,
140                                           button_irq, "b1on", priv);
141                 if (err) {
142                         dev_dbg(&pdev->dev, "Can't request irq\n");
143                         goto free_priv;
144                 }
145         }
146 
147         if (pdata->b2on_flags & MC13783_BUTTON_ENABLE) {
148                 priv->keymap[1] = pdata->b2on_key;
149                 if (pdata->b2on_key != KEY_RESERVED)
150                         __set_bit(pdata->b2on_key, pwr->keybit);
151 
152                 if (pdata->b2on_flags & MC13783_BUTTON_POL_INVERT)
153                         priv->flags |= MC13783_PWRB_B2_POL_INVERT;
154 
155                 if (pdata->b2on_flags & MC13783_BUTTON_RESET_EN)
156                         reg |= MC13783_POWER_CONTROL_2_ON2BRSTEN;
157 
158                 err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD2,
159                                           button_irq, "b2on", priv);
160                 if (err) {
161                         dev_dbg(&pdev->dev, "Can't request irq\n");
162                         goto free_irq_b1;
163                 }
164         }
165 
166         if (pdata->b3on_flags & MC13783_BUTTON_ENABLE) {
167                 priv->keymap[2] = pdata->b3on_key;
168                 if (pdata->b3on_key != KEY_RESERVED)
169                         __set_bit(pdata->b3on_key, pwr->keybit);
170 
171                 if (pdata->b3on_flags & MC13783_BUTTON_POL_INVERT)
172                         priv->flags |= MC13783_PWRB_B3_POL_INVERT;
173 
174                 if (pdata->b3on_flags & MC13783_BUTTON_RESET_EN)
175                         reg |= MC13783_POWER_CONTROL_2_ON3BRSTEN;
176 
177                 err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD3,
178                                           button_irq, "b3on", priv);
179                 if (err) {
180                         dev_dbg(&pdev->dev, "Can't request irq: %d\n", err);
181                         goto free_irq_b2;
182                 }
183         }
184 
185         mc13xxx_reg_rmw(mc13783, MC13783_REG_POWER_CONTROL_2, 0x3FE, reg);
186 
187         mc13xxx_unlock(mc13783);
188 
189         pwr->name = "mc13783_pwrbutton";
190         pwr->phys = "mc13783_pwrbutton/input0";
191         pwr->dev.parent = &pdev->dev;
192 
193         pwr->keycode = priv->keymap;
194         pwr->keycodemax = ARRAY_SIZE(priv->keymap);
195         pwr->keycodesize = sizeof(priv->keymap[0]);
196         __set_bit(EV_KEY, pwr->evbit);
197 
198         err = input_register_device(pwr);
199         if (err) {
200                 dev_dbg(&pdev->dev, "Can't register power button: %d\n", err);
201                 goto free_irq;
202         }
203 
204         platform_set_drvdata(pdev, priv);
205 
206         return 0;
207 
208 free_irq:
209         mc13xxx_lock(mc13783);
210 
211         if (pdata->b3on_flags & MC13783_BUTTON_ENABLE)
212                 mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD3, priv);
213 
214 free_irq_b2:
215         if (pdata->b2on_flags & MC13783_BUTTON_ENABLE)
216                 mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD2, priv);
217 
218 free_irq_b1:
219         if (pdata->b1on_flags & MC13783_BUTTON_ENABLE)
220                 mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD1, priv);
221 
222 free_priv:
223         mc13xxx_unlock(mc13783);
224         kfree(priv);
225 
226 free_input_dev:
227         input_free_device(pwr);
228 
229         return err;
230 }
231 
232 static int mc13783_pwrbutton_remove(struct platform_device *pdev)
233 {
234         struct mc13783_pwrb *priv = platform_get_drvdata(pdev);
235         const struct mc13xxx_buttons_platform_data *pdata;
236 
237         pdata = dev_get_platdata(&pdev->dev);
238 
239         mc13xxx_lock(priv->mc13783);
240 
241         if (pdata->b3on_flags & MC13783_BUTTON_ENABLE)
242                 mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD3, priv);
243         if (pdata->b2on_flags & MC13783_BUTTON_ENABLE)
244                 mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD2, priv);
245         if (pdata->b1on_flags & MC13783_BUTTON_ENABLE)
246                 mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD1, priv);
247 
248         mc13xxx_unlock(priv->mc13783);
249 
250         input_unregister_device(priv->pwr);
251         kfree(priv);
252 
253         return 0;
254 }
255 
256 static struct platform_driver mc13783_pwrbutton_driver = {
257         .probe          = mc13783_pwrbutton_probe,
258         .remove         = mc13783_pwrbutton_remove,
259         .driver         = {
260                 .name   = "mc13783-pwrbutton",
261                 .owner  = THIS_MODULE,
262         },
263 };
264 
265 module_platform_driver(mc13783_pwrbutton_driver);
266 
267 MODULE_ALIAS("platform:mc13783-pwrbutton");
268 MODULE_DESCRIPTION("MC13783 Power Button");
269 MODULE_LICENSE("GPL v2");
270 MODULE_AUTHOR("Philippe Retornaz");
271 

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